JPH069102U - Terminal connection structure for electrical equipment - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide a terminal connection structure for an electric device in which a desired contact pressure is maintained and a relay terminal that is electrically connected to an external terminal does not rattle. [Structure] A fixed piece portion 23 that presses the opposite side portions 21 and 21 of the relay terminal 20 against the inner surface of the recess 14 of the internal component 4.
And elastically deforms in the plate thickness direction independently of the fixing piece portion 23,
It is configured by a clamping piece 24 that compresses the electrical connection portion 2a of the external terminal 2 fixed to the base 1.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a terminal connection structure for electric devices such as electromagnetic relays and electric contactors.

[0002]

[Prior art]

 BACKGROUND ART Conventionally, there is an electric device, for example, an electromagnetic relay shown in FIG. In this electromagnetic relay, the coil terminal 2 and the fixed contact terminal 3 are fixed to the base 1, and the internal component 4 is placed on the upper surface of the base 1 and covered with the case 5. The internal component 4 includes a coil 8 wound around a laminated iron core 6 via a spool 7, and one end of the iron core 6 is caulked and fixed to a vertical portion of a yoke 9 and an electromagnet block 10 (see FIG. 6) is movable. The iron piece 11 and the movable contact piece 12 are integrated with each other, and the movable block 13 is rotatably arranged at the horizontal end of the yoke 9.

A recess 14 is formed in one flange 7a of the spool 7 (FIG. 6), and a relay terminal 15 is press-fitted therein. As shown in FIG. 7, the concave portion 14 is opened laterally and downward of the flange portion 7a, and a bulging portion 14a is formed on the lower side of the facing inner surface to narrow the width. ing. On the other hand, the relay terminal 15 is formed by bending a conductive thin plate into a substantially U shape, and the vicinity of the end portions of the facing portions 15a, 15a is bent inwardly to be narrow. In addition, a coil baffle portion 15b is extended from an intermediate position of one facing portion 15a, and one end of the coil 8 is baffled and soldered. Then, when the electromagnet block 10 is placed on the base 1, the electrical connection portion 2a located at the upper end of the coil terminal 2 is press-fitted into the relay terminal 15, and the electrical connection between them is achieved (see FIG. 8). .

[0004]

However, in the relay terminal 15, when the facing portions 15a, 15a are bent so as to approach each other, the contact pressure between the coil terminal 2 and the electrical connecting portion 2a can be increased. However, rattling may occur between the inner surface of the recess 14 formed on the spool 7 and the coil 7 may fall off during coil winding, or may be misaligned to hinder the coil peeling work.

On the other hand, when the facing portions 15a are bent so as to be separated from each other, the facing portions 15a are pressed against the inner surface of the concave portion 14 and the relay terminal 15 is firmly fixed, and the above-mentioned problem is solved. However, this time, conversely, the contact pressure between the coil terminal 2 and the electrical connecting portion 2a becomes smaller, and the electrical resistance may increase, resulting in heat generation. In view of the above problems, it is an object of the present invention to provide a terminal connection structure for an electric device in which a desired contact pressure is maintained and a relay terminal for electrical connection with an external terminal does not rattle.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention comprises an external terminal having an electric connection portion protruding from an upper surface of a base, and an elastic plate-like body having electrical conductivity, bent into a substantially U-shape, and mounted on the base. A terminal of an electric device, which is press-fitted into a recess of an internal component to be placed and electrically connected to the internal component, and which is formed with a relay terminal that presses the electrical connection portion of the external terminal at opposing portions on both sides. In the connection structure, both sides of the relay terminal are fixedly pressed against the inner surface of the recess of the internal component, and elastically deformed in the plate thickness direction independently of the fixed piece to electrically connect the external terminal. It is composed of a compression piece that compresses the part.

[0007]

[Action]

 According to the present invention, when the relay terminal is disposed in the recess of the internal component, the fixing piece portion presses against the inner surface of the recess, and the elastic force holds the relay terminal in the recess. When the external terminal is press-fitted into the relay terminal, the clamping piece of the relay terminal compresses the electrical connection portion of the external terminal, so that a desired contact pressure is obtained between the two by the elastic force of the clamping piece.

[0008]

【Example】

 Next, an embodiment of the present invention will be described with reference to FIGS. The electromagnetic relay having the terminal connection structure according to the present invention has the same configuration as the conventional electromagnetic relay shown in FIG. 5, except for the shape of the relay terminal 20.

That is, as shown in FIG. 1, the relay terminal 20 is formed by bending a conductive thin plate into a substantially U-shape, and slits are formed on the rear side of the both-side facing portions 21 and 21 from the lower end to the upper side. 22 (one is not shown) is formed. Due to this slit 22, a constricting piece portion 23 is formed on the front side of the facing portion 21, and a fixing piece portion 24 is formed on the rear side. The clamping forceps 23, 23 are bent so that the intermediate portions are close to each other, and the fixed clamping forceps 24 have substantially the same shape. However, the distance A between the facing surfaces of the pressing piece portions 23, 23 is smaller than the plate thickness C of the electrical connecting portion 2a of the coil terminal 2, and the maximum outer surface distance B of the fixing piece portions 24, 24 is the recess formed in the spool 7. It is wider than the width dimension D of the bulging portions 14a, 14a of 14 (see FIGS. 3 and 4). Further, a coil barb 21a extends laterally from the intermediate portion at one facing portion 21 (back side) of the relay terminal 20.

The relay terminal 20 having the above-described shape is laterally inserted into the recess 14 of the spool 7, as shown in FIG. In the inserted state, the fixing piece portion 23 presses against the inner side surface of the concave portion 14 to position the relay terminal 20 inside the concave portion 14, and the sandwiching pressure piece portion 24 is located inside away from the inner side surface of the concave portion 14. . As shown in FIGS. 2 and 4, the electrical connecting portion 2a of the coil terminal 2 is press-fitted between the opposing pressing piece portions 24 so that the relay terminal 20 and the coil terminal 2 are electrically connected. It

As described above, since the relay terminal 20 is held in the recess 14 of the spool 7 by the fixed piece portion 23, even if the spool 7 is rotated and the coil 8 is wound, the relay terminal 20 is centrifuged. Even if force is applied, the relay terminal 20 will not be displaced in the concave portion 14 and will not fall out of the concave portion 14. Further, since the relay terminal 20 holds the electric connecting portion 2a of the coil terminal 2 by the elastic force of the pressing piece 24 that elastically deforms in the plate thickness direction independently of the fixed piece 23, it is always constant. The electrical connection can be achieved with the contact pressure of. In addition, in the said Example, although the electromagnetic relay was demonstrated as an electric equipment, it may be an electromagnetic contactor, such as a contactor.

[0012]

[Effect of device]

 As is clear from the above description, according to the terminal connection structure for an electric device according to the present invention, the opposite side portions of the relay terminal are independently formed by a compression piece portion and a fixing piece portion that elastically deform in the plate thickness direction. Since it is formed, the fixing piece presses against the inner surface of the recess of the internal component to prevent the displacement and dropping of the relay terminal during the assembly process, while the compression piece is the electrical connection part of the external terminal. Since the desired contact pressure is secured by pressing down, the problem that the electric resistance becomes high and heat is generated is solved.

[Brief description of drawings]

FIG. 1 is a perspective view showing a relay terminal according to an embodiment and a recess for press-fitting the relay terminal.

FIG. 2 is a front view showing a state in which a relay terminal and an external terminal are electrically connected.

FIG. 3 is a side view of a relay terminal.

FIG. 4 is a side sectional view showing a state in which an electrical connection portion of an external terminal is press-fitted into a relay terminal arranged in a recess.

FIG. 5 is a front sectional view of an electromagnetic relay according to a conventional example.

6 is an exploded perspective view of the electromagnet block of FIG.

7 is a partially enlarged perspective view of FIG.

8 is a front view showing a state in which an external terminal is press-fitted into the relay terminal of FIG.

[Explanation of symbols]

2 ... Coil terminal (external terminal), 2a ... Electric connection part, 4 ...
Internal components, 7 ... Spool, 14 ... Recessed portion, 20 ... Relay terminal, 21 ... Facing portion, 23 ... Fixed piece portion, 24 ... Clamping piece portion.

Claims (1)

[Scope of utility model registration request] 1. An internal component which is mounted on the base by bending an external terminal having an electrical connection portion protruding from an upper surface of the base and an elastic plate-like body having conductivity into a substantially U shape. In the terminal connection structure of the electric device, which is press-fitted into the concave portion of the electric device and electrically connected to the internal component, and a relay terminal that presses the electric connection portion of the external terminal at both opposite sides, A fixing piece portion that presses the opposite side portions of the terminal to the inner surface of the recess of the internal component, and a clamping pressure that elastically deforms in the plate thickness direction independently of the fixing piece portion and compresses the electrical connection portion of the external terminal. A terminal connection structure for an electric device, characterized by being configured with one part.